Revert "atari5200: fix COLOR defines' names"

[cc65] / libsrc / pce / vdc.s

diff --git a/libsrc/pce/vdc.s b/libsrc/pce/vdc.s
index 0f42fe1b06545994a1d93f1d5dc976253f9c3b7f..8495a9163017b3f6f730b0e08e8c71881d8ac8ad 100644 (file)
--- a/libsrc/pce/vdc.s
+++ b/libsrc/pce/vdc.s
@@ -1,40 +1,32 @@
+        .export         vdc_init
 
-                        .include "pce.inc"
+        .include        "pce.inc"
 
-HIRES = 1
-
-                        .export vdc_init
+; FIXME: implement selection of different video modes at runtime
+HIRES   = 1
 
 vdc_init:
-                        lda     a:VDC_CTRL
+        lda     VDC_CTRL
 
-                        VREG    $00, $0000 ; MAWR
-                        VREG    $01, $0000 ; MARR
-                        VREG    $05, $0000 ; CR
-                        VREG    $06, $0000 ; RCR
-                        VREG    $07, $0000 ; BXR
-                        VREG    $08, $0000 ; BYR
-                        VREG    $09, $0070 ; MAWR
-                        VREG    $0C, $1702 ; CRTC - VSR
-                        VREG    $0D, $00DF ; CRTC - VDS
-                        VREG    $0E, $000C ; CRTC - VDE
-                        VREG    $0F, $0000 ; DCR
+        VREG    VDC_CR , $0000  ; disable display and interrupts
+        VREG    VDC_BXR, $0000  ; no scrolling
+        VREG    VDC_BYR, $0000
+        VREG    VDC_MWR, $0070  ; 128 x 64 tiles (1024 x 512 pixels)
+        VREG    VDC_VSR, $1702  ; CRTC
+        VREG    VDC_VDR, $00DF  ; CRTC - VDS
+        VREG    VDC_VCR, $000C  ; CRTC - VDE
+        VREG    VDC_DCR, $0000
 
 .if      HIRES
-
-                        VREG    $0A, $0C02 ; CRTC - HSR
-                        VREG    $0B, $043C ; CRTC - HDS
-                        lda     #$06
-                        sta     VCE_CTRL
-
+        VREG    VDC_HSR, $0C02  ; CRTC
+        VREG    VDC_HDR, $043C  ; CRTC - HDS
+        lda     #$06
 .else
-
-                        VREG    $0A, $0202 ; CRTC - HSR
-                        VREG    $0B, $041F ; CRTC - HDS
-                        lda     #$04
-                        sta     VCE_CTRL
-
+        VREG    VDC_HSR, $0202  ; CRTC
+        VREG    VDC_HDR, $041F  ; CRTC - HDS
+        lda     #$04
 .endif
+        sta     VCE_CTRL
 
-                        lda     a:VDC_CTRL
-                        rts
+        lda     VDC_CTRL
+        rts